British Gastromycetes . 53 
Pisolithus arenarius, Alb. et Schw., Conspect. Fung. p. 
82, tab. i, f. 3. 
P isocar pium arenarium , Nees, Syst. i, p. 27. 
Lycoperdon capsuliferum , Sow., Eng. Fung. pi. 425* 
Exs. — Rav., Fung. Amer. 470 ; Roum., Fung. Gall. 3311 ; 
Welw., Crypt. Lusitana, 60. 
On the ground in sandy places. England. — Europe ; N 
America ; Australia ; New Zealand. 
Peridium smooth, even, or rather tuberculose, fragile, dehis- 
cing irregularly, reddish-brown, tinged olive, 1-3 in. diam. 
Sowerby’s plant is undoubtedly this species, and was at the 
time correctly referred to the figure of Albertini and Schwei- 
nitz, Consp. Fung. t. f. 3 ; which in turn is synonymous with P. 
pisocarpium . 
NIDULARIEAE. 
Spores produced in the interior of one or more indehiscent, 
globose, or compressed peridiola contained within a distinct 
peridium. 
Nidulariaceae , Fries, Syst. Myc. ii, p. 296 ; Tul., Mon. Nid. 
Ann. Sci. Nat. sdr. 3, i, p. 64 (in part). 
The genus Sphaerobolus is not included by Tulasne in the 
Nidularieae ; it is true that it differs in the peculiar arrange- 
ment for ejecting the solitary peridiolum from the peridium, 
but the most pronounced morphological feature of the group 
is to be found in the complete differentiation of peridiola from 
the hyphae of the gleba, and in this peculiarity Sphaerobolus 
agrees with Cyathus , Crudbulum , and Nidularia. The affini- 
ties of Thelebolus , the development of which is not known, is 
uncertain, but the general structure when mature justifies its 
being placed in the present order. 
Cyathus, Haller. 
Peridium composed of three distinct, closely connected 
layers, apex, at first closed by a white membrane (epiphragm), 
becoming broadly open ; peridiola compressed, umbilicate, 
attached to inner wall of peridium by an elastic cord 
(funiculus). 
